Which models are considered Big Twins?

Big Twins refer to larger displacement Harley-Davidsons, including Flathead, Knucklehead, Panhead, Shovelhead, Evo, and Twin Cam.

Do I need any special tools for installing custom Big Twin parts?

Basic hand tools usually suffice, but some installations (like welding) may require specialized equipment or professional assistance.

Can I return items if they don’t fit my Big Twin?

Absolutely. As long as the part is in original, unused condition, you can return it according to our standard return policy.

Harley-Davidson Big Twin Parts

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Prism Supply Co. Speedometer Cable Eliminator for 1936-1984 Harley-Davidson Big Twin 4 Speed
$16.99

Colony #3269-5 Rear Disk Brake Rotor Screw Kit 1997-Up Harley-Davidson All Models - Zinc Plated
2 reviews $11.32

Lowbrow Customs Finish Line Shifter Peg for Harleys - Black Aluminum
5 reviews $33.86

Colony #8807-17 Motor Mounting Kit Upper & Lower 1970-1984 Harley-Davidson Big Twin - Zinc Plated
2 reviews $33.67

Cycle Standard S&S Super E/G Carburetor Adapter for CV Air Cleaners - Chrome
2 reviews $33.53

Drag Specialties 58" Shovelhead Clutch Cable for 1968-1986 Harley Big Twin 4-Speed - Replaces OEM #38618-68C
8 reviews $66.73

Colony #2121-2 Rear Axle Covers 1981-2007 Harley-Davidson Softail - Chrome Plated
$66.32

Cycle Standard Screw-in Style Gas Cap Gasket replaces Harley-Davidson OEM #61109-85
24 reviews $4.13

Colony #3686-12 Lower Motor Mount Kit 1966-1969 Harley-Davidson OHV Big Twins - CAD Plated
$33.00

Colony #3735-4 Linkert Carburetor Gasket Kit 1933-65 Harley-Davidson
1 review $13.20

Colony #3574-1 Gas Tank Rubber Divider 1939-1979 Harley-Davidson Big Twins
$16.50

Colony #2595-13 Top Motor Mount Hardware 1952-1972 Harley-Davidson Big Twin 1957-1972 Sportster - CAD Plated
3 reviews $22.00

Colony #8740-19 Oil Pump Mounting Kit 1936-1967 Harley-Davidson OHV Big Twins - Chrome Plated
$33.00

Standard Motorcycle Products Ignition Sensor Assembly - 1995-97 Harley-Davidson XL 1998-03 XL1200S
2 reviews $65.95

Cycle Standard Headlight Visor - 5-3/4" Headlight - Black - Replaces OEM #69738-05
$32.97 $43.96

Cycle Craft #40 Pilot Jet - 1988-2006 Keihin CV Carburetor
1 review $5.99

Colony #9869-24 Inner Primary Mounting Kit 1980-1985 Harley-Davidson FL/FX
$32.50

Fast Eddy Co. No. 40 Crankcase Timken Race Remover / Installer
2 reviews $64.95

Colony #7823-12 Pushrod Covers 1948-Early 1979 Harley-Davidson Panhead & Shovelhead - Chrome Plated
4 reviews $64.80

Colony #7604-7 Upper Motor Mount Kit Acorns Nut 1936-1984 Harley-Davidson OHV Big Twins - Chrome Plated
4 reviews $21.52

Colony #8148-13 Transmission Top Cover Screw Kit 1956-1964 Harley-Davidson Big Twins - CAD Plated
2 reviews $21.30

Colony #8142-34 Motor Case Kit Acorn Head 1979-1995 Harley-Davidson Shovelhead/Evo - Chrome Plated
$63.61

Drag Specialties Clutch Cable OEM #38599-83A Harley-Davidson 5 Speed Big Twin 1980-1986 +6 inch Extended
1 review $63.55

Colony #3358-4 Handlebar Riser Cupped Washers 1973-Up Harley-Davidson All Models - Zinc Plated
$12.71

Colony #2488-1 Wheel Lug Wrench - 1936-1972 Harley-Davidson Knucklehead/Panhead/Shovelhead
1 review $63.25

Cycle Standard Oil Filter OEM# 63840-53 for Harley-Davidson Big Twins with Filter In Tank
9 reviews $9.00

Colony #8863-1 Fork Tube Cap/Bolt Mid 1985-1987 Harley-Davidson FX/XL - Chrome Plated
$31.50

K&N Air Filters Oil Filter - Chrome - 1982-1985 Harley-Davidson Big Twin - K&N Part # KN-172C
$20.99

Colony #3718-4 Fuel Tank Rubber Grommet Kit 2000-2017 Harley-Davidson Softails
$20.90

Colony #9010-5 Linkert Carb Support Bracket 1954-1965 Harley-Davidson OEM #27431-41B - Parkerized
3 reviews $20.90

Colony #2370-8 Cylinder Head Motor Brace Mounting Kit 1966-1984 Harley-Davidson Shovelhead - CAD Plated
2 reviews $20.85

Colony #2146-2 Tappet Oil Screen & Spring 1970-1999 Harley-Davidson Big Twin
2 reviews $10.42

Unity Manufacturing Clutch Retaining Washer - 1936-1984 Harley-Davidson
$12.50

Colony #8777-20-P Smooth Allen Head Bolt Kit 1948-Up Harley-Davidson Panhead/Shovelhead - Chrome Plated
$62.27

Cycle Standard Transmission Seal and Quad O-ring OEM# 12067A
$10.35

Colony #9654-4 Oversize Transmission Case Bottom Stud Kit 1936-1983 Harley-Davidson Big Twins - Parkerized
3 reviews $20.70

Colony #8927-3 Gas Strainer Screen 1932-1964 Harley-Davidson Big Twins/45s OEM #62265-32
2 reviews $20.70

Colony #8820-9-P Transmission Side Cover Smooth Allen Screw Kit 1936-Up Harley-Davidson Big Twin 4 Speeds - Chrome Plated
$20.65

Fast Eddy Co. No. 4 Cam Gauge Pins .105" 1989 & earlier Harley Big Twins
1 review $39.95

Drag Specialties Inner Primary Mainshaft Bearing Seal Kit 1989-99 Harley-Davidson Big Twin 99-06 Twin Cam
1 review $61.83

Colony #3286-12 Rocker Box Mounting Kit 1936-1947 Harley-Davidson Knucklehead - Parkerized
$20.57

Colony #2430-2 Transmission Mainshaft Bearing Nut and Lock Tab 1936-1985 Harley-Davidson Big Twin - Parkerized
3 reviews $15.31

Lowbrow Customs Rocker Box Oil Pressure Gauge Adapter Fitting - Chrome - 1966 - 1970 Harley-Davidson Shovelhead, 1957 - 1970 Sportster
2 reviews $30.51

Colony #8233-1 Fork Tube Bolt 1978-Up Harley-Davidson Wide Glide - Chrome Plated
1 review $20.31

Cycle Standard Shift Lever Bracket 1970-1984 Harley-Davidson FL Models - OEM #33630-70
$60.53

Colony #3366-4 Brass Exhaust Port Nuts Harley-Davidson 1986-Up XL 1984-1999 Big Twins 1999-Up Twin Cam
6 reviews $12.10

Colony #3656-1 Linkert Main Nozzle 1933-1958 Harley-Davidson Big Twin/45's
1 review $30.00

Colony #3641-2 Buddy Seat Auxiliary Spring Clip - Light - 1936-1964 Harley-Davidson Big Twins - Parkerized
$30.00

Marion Metalworks Super Carb Mounting Kit
$60.00

Prism Supply Co. Kickstand Mounting Bracket for Harley-Davidson Big Twin Frames - Mild Steel
$29.99

Prism Supply Co. Ratchet Top Shifter Plate - Mild Steel
$29.99

Colony #9602-8 Oil Tank Mounting Kit - 1936-1957 Harley-Davidson Knucklehead/Panhead- Chrome Plated
2 reviews $19.97

S&S Cycle Ignition Rotor - 1970-99 Harley-Davidson Big Twins
$19.95

Drag Specialties SAE 80W-90 High-Performance Mineral Transmission Oil for Big Twins - 1 quart
$14.95

Colony #9653-4 Transmission Case Bottom Stud Kit 1936-1983 Harley-Davidson Big Twins - Parkerized
4 reviews $19.93

Colony #2095-4 Handlebar Riser Allen Bolt Kit 1/2-13 x 2-3/4" Harley-Davidson FXST/FLST Models - Chrome Plated
2 reviews $14.89

Colony #9685-12 Floorboard Hinge Bolt Kit 1941-1984 Harley-Davidson All Models - Parkerized
5 reviews $14.89

Cycle Standard Fork Neck Cup Dust Shield - Top - for Harley-Davidson Big Twins OEM #48361-80
12 reviews $9.92

Colony #3805-12 Inner Primary Cover Mounting Stud Kit 1965-1969 Harley-Davidson FL/FLH
$19.80

Colony #3662-5 Disc Rotor Allen Screw & Nut Kit 1979-1991 Harley-Davidson XL/FX (Cast Wheel) - Chrome Plated
1 review $14.85

Colony #3567-1 Front Wheel Hub Plate 1991-1999 Harley-Davidson XL 1984-1999 FXR/FXD - Silver
3 reviews $19.80

Colony #3566-1 Front Wheel Hub Plate 1991-1999 Harley-Davidson XL 1984-1999 FXR/FXD - Black
2 reviews $19.80

Colony #2320-1 Transmission Mainshaft Lock Nut 1992-Up Harley-Davidson Big Twin/Sportsters
$19.80

Cycle Standard Screw-In Harley Stock Style Non-Vented Gas Cap - Left Side - 1996 & up - Chrome
$29.43

Cycle Standard Oil Filter for Harley-Davidson Sportster and Big Twin Models - Black - OEM #63782-80
1 review $14.62

Colony #8143-34 Motor Case Kit Stock 1979-1995 Harley-Davidson Shovelhead/Evo - Chrome Plated
$58.30

Cycle Standard Heavy Duty Clutch Spring Kit 1968-1984 Harley-Davidson Big Twins
$29.11

Colony #3544-3 Oil Line Nuts 1915-1964 Harley-Davidson All Models OEM #3581-15 - CAD Plated
$14.52

Colony #3267-5 Disc Front Brake Rotor to Hub Torx Screw Set 1984-Up Harley-Davidson FX/FXR/XL/FLT - Zinc Plated
6 reviews $9.68

Colony #9944-24 Rocker Box Mounting Allen Kit 1999-Up Twin Cam Dyna/FLT 2000-Up Softail - Chrome Plated
2 reviews $19.36

Colony #2125-12 Floorboard Hinge Bolt Kit 1982-Up Harley-Davidson FL - Chrome Plated
1 review $19.36

Colony #9862-8 Springer Spring Rod Kit 1931-1936 Harley-Davidson VL - Zinc Plated
$57.94

Harley-Davidson Big Twin motorcycles are legendary for their raw power, distinctive style, and unmatched capacity for customization. From the Flathead and Knucklehead to the Panhead, Shovelhead, Evo, and Twin Cam, each Big Twin engine carries its...

If you’re looking to transform your ride—enhancing speed, comfort, or that unmistakable retro look—explore our Harley-Davidson Big Twin Parts collection. We have everything you need to customize your bike, whether you’re focusing on performance upgrades or eye-catching aesthetics.

Why Upgrade a Harley-Davidson Big Twin?

Boundless Customization: Big Twins allow for radical transformations—from stripped-down bobbers to vintage choppers—letting you express your unique vision.
Enhanced Performance: Boost horsepower, torque, and responsiveness with high-quality ignition kits, carburetors, and more.
Personalized Aesthetics: Whether it’s a retro-inspired racer or a comfortable tourer, your bike can reflect your style and riding needs.

Why Buy Big Twin Motorcycle Parts at Lowbrow Customs?

We curate top brands and rigorously test products for durability, fitment, and performance before shipping them out.
Variety of Choices: We offer a carefully curated selection of motorcycle parts for a wide range of Big Twin engines—from the Flathead and Knucklehead to the Panhead, Shovelhead, Evo, and Twin Cam—so you can find the perfect fit for your ride.
Expert Guidance: Need advice on installing a gas tank or swapping out your ignition? Our dedicated staff is here to help—from how-to videos to step-by-step articles.
Passion for Custom Builds: We’re not just sellers—we’re fellow riders who believe in the art of motorcycle customization. Count on our expertise to bring your dream bike to life.
Wide Selection & Fast Shipping: Our warehouse in northeast Ohio is stocked daily, ensuring you get the parts you need quickly. Plus, enjoy free economy shipping on U.S. orders over $99 and flexible return policy within 90-day & no return fee.

Our Featured Big Twin Motorcycle Parts Products

Ignition Kits & Carburetors: Gain more power and better throttle response by upgrading your ignition and carb system. A refined setup can increase speed, torque, and overall rideability.
Custom Gas Tanks: Our Big Twin gas tanks are crafted from high-grade steel, pressure-tested to prevent leaks, and available in multiple shapes and capacities. Achieve the perfect balance between form and function.
Handlebars & Controls: From vintage ape hangers to sporty drag bars, our collection of handlebars offers different heights, widths, and designs. Complete the setup with controls like grips, mirrors, and brake/clutch assemblies for a cohesive look.
Retro Accessories: Elevate your Big Twin’s retro appeal with add-ons like vintage-inspired seats, windshield options, saddle bags, or even a top-mounted box for touring. Personalizing these details completes the old-school charm.

Ready to Customize Your Harley-Davidson Big Twin?

Explore our Harley-Davidson Big Twin Parts collection today and transform your ride into the perfect blend of power, comfort, and style. If you have questions, reach out to our expert support team or dive into our installation guides for pro tips. Let’s make your dream bike a reality—shop now and gear up for the open road.

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Harley-Davidson Big Twin Parts FAQ

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